<?php
/**
 * Created by PhpStorm.
 * User: qq
 * Date: 2016/9/27
 * Time: 8:27
 */



header('Content-type:text/html;charset=utf-8');
?>









<?php

$name='小明';
$score=78;

if(is_int($score)||is_float($score)){
if($score>=90 && $score<=100){
$str='A级';}
elseif($score>=80 && $score<90){
$str='B级';}
elseif($score>=70 && $score<80){
$str='C级';}
elseif($score>=60 && $score<70){
$str='D级';}
elseif($score>=0 && $score<60){
$str='E级';}
else{
$str='学生成绩必须在0-100！';}
else{
$str='输入的学生成绩不是数值！';}

